healthcare starting under $40 a month. i got education benefits. i work at walmart. i'm a pharmacist. sales associate. i manage produce. i work in logistics. there's more to walmart than you think. vo: opportunity. that's the real walmart. >>> we are following developing news at this hour. a lone suspect entering los angeles international airport and opening fire. the terrifying situation unfolded earlier this morning with multiple victims shot. the airport evacuated, flights grounded. the situation that law enforcement officials say is always at the front of their minds. >> not more than three weeks ago, we took every one of our officers, our patrol officers, and a couple hundred officers from the los angeles police department, and we practiced the exact scenario that played out today. we played out today. and i was talking to the officers involved in this particular incident a few minutes ago. and they said that that training was critical to how they responded to this. >> joining us now, heather mcgee, vice president of demos.org, and msnbc contributor, james patte